/*
 * Copyright 2025 LinQingYing. and contributors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * The use of this source code is governed by the Apache License 2.0,
 * which allows users to freely use, modify, and distribute the code,
 * provided they adhere to the terms of the license.
 *
 * The software is provided "as-is", and the authors are not responsible for
 * any damages or issues arising from its use.
 *
 */

package org.cangnova.cangjie.types.checker

import org.cangnova.cangjie.types.CangJieType
import org.cangnova.cangjie.types.TypeConstructor

class CangJieTypeCheckerImpl protected constructor(procedure: TypeCheckingProcedure) :
    CangJieTypeChecker {
    private val procedure: TypeCheckingProcedure = procedure

    override fun isSubtypeOf(
        subtype:  CangJieType,
        supertype:  CangJieType
    ): Boolean {
        return procedure.isSubtypeOf(subtype, supertype)
    }

    override fun equalsIgnoringGenerics(a: CangJieType, b: CangJieType): Boolean {

        return procedure.equalsIgnoringGenerics(a, b)

    }
    override fun equalTypes(
        a:  CangJieType,
        b: CangJieType
    ): Boolean {
        return procedure.equalTypes(a, b)
    }

    companion object {
        fun withAxioms(equalityAxioms: CangJieTypeChecker.TypeConstructorEquality): CangJieTypeChecker {
            return CangJieTypeCheckerImpl(  TypeCheckingProcedure(object :
                TypeCheckerProcedureCallbacksImpl() {
                override fun assertEqualTypeConstructors(
                    a: TypeConstructor,
                    b:  TypeConstructor
                ): Boolean {
                    return a == b || equalityAxioms.equals(a, b)
                }
            }))
        }
    }
}
